International Comfort Products 1171324 Limit Switch 135-40F Differential

The International Comfort Products 1171324 is a genuine OEM limit switch designed for gas furnaces and HVAC heating systems. This critical safety component monitors internal furnace temperatures and controls blower operation to prevent overheating and ensure safe, efficient heating performance.

Key Features:

• Temperature rating: 135°F with 40°F differential
• Genuine OEM replacement part for International Comfort Products furnaces
• Automatically shuts off burner when temperatures exceed safe limits
• Controls blower fan activation based on heat exchanger temperature
• Compatible with ICP, Heil, Tempstar, Arcoaire, and Comfortmaker heating systems
• Disc-style limit switch design for reliable temperature sensing

This limit switch serves dual functions: it prevents the blower from distributing air until the furnace reaches proper heating temperature, and it acts as a high-limit safety cutoff to protect the heat exchanger from overheating. The 40°F differential ensures the blower continues running after the burner cycles off, maximizing heat transfer efficiency and comfort.

Cross-Reference Numbers: Also known as P1171324, 1NT01L-1781, L135F-40, 1803, HH18HA139, LF18-194, and other compatible part numbers. UPC: 737287059932.